Support for passing encryption key.

Author: cincuranet

Provider/src/FirebirdSql.Data.FirebirdClient/Client/Managed/GdsConnection.cs

@@ -24,6 +24,7 @@
 using System.Net.Sockets;
 using System.Text;
 using FirebirdSql.Data.Client.Managed.Version11;
+using FirebirdSql.Data.Client.Managed.Version13;
 using FirebirdSql.Data.Common;
 
 namespace FirebirdSql.Data.Client.Managed
@@ -369,6 +370,9 @@ public static IResponse ProcessOperation(int operation, XdrStream xdr)
 				case IscCodes.op_trusted_auth:
 					return new AuthResponse(xdr.ReadBuffer());
 
+				case IscCodes.op_crypt_key_callback:
+					return new CryptKeyCallbackReponse(xdr.ReadBuffer());
+
 				default:
 					return null;
 			}

Provider/src/FirebirdSql.Data.FirebirdClient/Client/Managed/Version10/GdsDatabase.cs

@@ -164,7 +164,7 @@ public void Dispose()
 
 		#region Attach/Detach Methods
 
-		public virtual void Attach(DatabaseParameterBuffer dpb, string dataSource, int port, string database)
+		public virtual void Attach(DatabaseParameterBuffer dpb, string dataSource, int port, string database, byte[] cryptKey)
 		{
 			try
 			{
@@ -208,7 +208,7 @@ protected void AfterAttachActions()
 			_serverVersion = GetServerVersion();
 		}
 
-		public virtual void AttachWithTrustedAuth(DatabaseParameterBuffer dpb, string dataSource, int port, string database)
+		public virtual void AttachWithTrustedAuth(DatabaseParameterBuffer dpb, string dataSource, int port, string database, byte[] cryptKey)
 		{
 			throw new NotSupportedException("Trusted Auth isn't supported on < FB2.1.");
 		}

Provider/src/FirebirdSql.Data.FirebirdClient/Client/Managed/Version11/GdsDatabase.cs

@@ -65,7 +65,7 @@ public override StatementBase CreateStatement(TransactionBase transaction)
 		#endregion
 
 		#region Trusted Auth
-		public override void AttachWithTrustedAuth(DatabaseParameterBuffer dpb, string dataSource, int port, string database)
+		public override void AttachWithTrustedAuth(DatabaseParameterBuffer dpb, string dataSource, int port, string database, byte[] cryptKey)
 		{
 			try
 			{

Provider/src/FirebirdSql.Data.FirebirdClient/Client/Managed/Version13/CryptKeyCallbackReponse.cs

@@ -0,0 +1,34 @@
+/*
+ *  Firebird ADO.NET Data provider for .NET and Mono
+ *
+ *     The contents of this file are subject to the Initial
+ *     Developer's Public License Version 1.0 (the "License");
+ *     you may not use this file except in compliance with the
+ *     License. You may obtain a copy of the License at
+ *     http://www.firebirdsql.org/index.php?op=doc&id=idpl
+ *
+ *     Software distributed under the License is distributed on
+ *     an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either
+ *     express or implied.  See the License for the specific
+ *     language governing rights and limitations under the License.
+ *
+ *  Copyright (c) 2017 Jiri Cincura (jiri@cincura.net)
+ *  All Rights Reserved.
+ *
+ */
+
+using System;
+using FirebirdSql.Data.Client.Managed;
+
+namespace FirebirdSql.Data.Client.Managed.Version13
+{
+	internal class CryptKeyCallbackReponse : IResponse
+	{
+		public byte[] Data { get; }
+
+		public CryptKeyCallbackReponse(byte[] data)
+		{
+			Data = data;
+		}
+	}
+}

Provider/src/FirebirdSql.Data.FirebirdClient/Client/Managed/Version13/GdsDatabase.cs

@@ -37,6 +37,36 @@ public GdsDatabase(GdsConnection connection)
 			: base(connection)
 		{ }
 
+		public override void Attach(DatabaseParameterBuffer dpb, string dataSource, int port, string database, byte[] cryptKey)
+		{
+			try
+			{
+				SendAttachToBuffer(dpb, database);
+				XdrStream.Flush();
+				var response = ReadResponse();
+				while (response is CryptKeyCallbackReponse cryptResponse)
+				{
+					XdrStream.Write(IscCodes.op_crypt_key_callback);
+					XdrStream.WriteBuffer(cryptKey);
+					XdrStream.Flush();
+					response = ReadResponse();
+				}
+				ProcessAttachResponse(response as GenericResponse);
+			}
+			catch (IscException)
+			{
+				SafelyDetach();
+				throw;
+			}
+			catch (IOException ex)
+			{
+				SafelyDetach();
+				throw IscException.ForErrorCode(IscCodes.isc_net_write_err, ex);
+			}
+
+			AfterAttachActions();
+		}
+
 		protected override void SendAttachToBuffer(DatabaseParameterBuffer dpb, string database)
 		{
 			XdrStream.Write(IscCodes.op_attach);
@@ -63,9 +93,9 @@ protected override void SendCreateToBuffer(DatabaseParameterBuffer dpb, string d
 			XdrStream.WriteBuffer(dpb.ToArray());
 		}
 
-		public override void AttachWithTrustedAuth(DatabaseParameterBuffer dpb, string dataSource, int port, string database)
+		public override void AttachWithTrustedAuth(DatabaseParameterBuffer dpb, string dataSource, int port, string database, byte[] cryptKey)
 		{
-			Attach(dpb, dataSource, port, database);
+			Attach(dpb, dataSource, port, database, cryptKey);
 		}
 
 		#region Override Statement Creation Methods

Provider/src/FirebirdSql.Data.FirebirdClient/Client/Native/FesDatabase.cs

@@ -202,8 +202,12 @@ public void CancelEvents(RemoteEvent events)
 
 		#region Methods
 
-		public void Attach(DatabaseParameterBuffer dpb, string dataSource, int port, string database)
+		public void Attach(DatabaseParameterBuffer dpb, string dataSource, int port, string database, byte[] cryptKey)
 		{
+			// ICryptKeyCallbackImpl would have to be passed from C# for 'cryptKey' passing
+			if (cryptKey?.Length > 0)
+				throw new NotSupportedException("Passing Encryption Key isn't, yet, supported on Firebird Embedded.");
+
 			byte[] databaseBuffer = Encoding2.Default.GetBytes(database);
 
 			ClearStatusVector();
@@ -221,9 +225,9 @@ public void Attach(DatabaseParameterBuffer dpb, string dataSource, int port, str
 			_serverVersion = GetServerVersion();
 		}
 
-		public void AttachWithTrustedAuth(DatabaseParameterBuffer dpb, string dataSource, int port, string database)
+		public void AttachWithTrustedAuth(DatabaseParameterBuffer dpb, string dataSource, int port, string database, byte[] cryptKey)
 		{
-			throw new NotSupportedException("Trusted Auth isn't supported on Embedded Firebird.");
+			throw new NotSupportedException("Trusted Auth isn't supported on Firebird Embedded.");
 		}
 
 		public void Detach()

Provider/src/FirebirdSql.Data.FirebirdClient/Common/IDatabase.cs

@@ -37,8 +37,8 @@ internal interface IDatabase : IDisposable
 		short Dialect { get; set; }
 		bool HasRemoteEventSupport { get; }
 
-		void Attach(DatabaseParameterBuffer dpb, string dataSource, int port, string database);
-		void AttachWithTrustedAuth(DatabaseParameterBuffer dpb, string dataSource, int port, string database);
+		void Attach(DatabaseParameterBuffer dpb, string dataSource, int port, string database, byte[] cryptKey);
+		void AttachWithTrustedAuth(DatabaseParameterBuffer dpb, string dataSource, int port, string database, byte[] cryptKey);
 		void Detach();
 
 		void CreateDatabase(DatabaseParameterBuffer dpb, string dataSource, int port, string database);

Provider/src/FirebirdSql.Data.FirebirdClient/FirebirdClient/FbConnectionInternal.cs

@@ -133,7 +133,7 @@ public void CreateDatabase(DatabaseParameterBuffer dpb)
 		public void DropDatabase()
 		{
 			IDatabase db = ClientFactory.CreateDatabase(_options);
-			db.Attach(BuildDpb(db, _options), _options.DataSource, _options.Port, _options.Database);
+			db.Attach(BuildDpb(db, _options), _options.DataSource, _options.Port, _options.Database, _options.CryptKey);
 			db.DropDatabase();
 		}
 
@@ -159,11 +159,11 @@ public void Connect()
 
 				if (string.IsNullOrEmpty(_options.UserID) && string.IsNullOrEmpty(_options.Password))
 				{
-					_db.AttachWithTrustedAuth(dpb, _options.DataSource, _options.Port, _options.Database);
+					_db.AttachWithTrustedAuth(dpb, _options.DataSource, _options.Port, _options.Database, _options.CryptKey);
 				}
 				else
 				{
-					_db.Attach(dpb, _options.DataSource, _options.Port, _options.Database);
+					_db.Attach(dpb, _options.DataSource, _options.Port, _options.Database, _options.CryptKey);
 				}
 			}
 			catch (IscException ex)